<!--父级页面:控制头部和左侧菜单栏-->
<template>
  <div style="display: flex">
    <div :style="{width:(isCollapse?'64px':'208px')}">
<!--      左侧菜单栏-->
        <el-menu
            background-color="#3c82f5"
            style="width: 100%; height: 100vh;"
            text-color="#fff"
            active-text-color="#ff0"
            unique-opened
            router
            :collapse="isCollapse"
            :collapse-transition="false"
        >
          <el-row style="padding-top: 10px">
            <el-col :span="2"></el-col>
            <el-col :span="7" style="padding-left: 7px">
              <el-avatar src="/imgs/admin/logo.png" style="width: 35px;height: 35px;"></el-avatar>
            </el-col>
            <el-col :span="isCollapse?0:13"><span style="color: #fff; font-weight:bold;position: relative;top: 8px;left: 2px; ">智慧车辆</span></el-col>
          </el-row>
          <el-sub-menu index="1">
            <template #title>
              <el-icon><User/></el-icon><span>用户管理</span>
            </template>
            <el-menu-item index="/user">用户列表</el-menu-item>
          </el-sub-menu>
          <el-sub-menu index="2">
            <template #title>
              <el-icon><Van/></el-icon><span>车辆管理</span>
            </template>
            <el-menu-item index="/vehicle">车辆列表</el-menu-item>
          </el-sub-menu>
          <el-sub-menu index="3">
            <template #title>
              <el-icon><Location/></el-icon><span>围栏管理</span>
            </template>
            <el-menu-item index="/geofence">围栏列表</el-menu-item>
          </el-sub-menu>
          <el-sub-menu index="4">
            <template #title>
              <el-icon><Place/></el-icon><span>调度管理</span>
            </template>
            <el-menu-item index="/application">申请列表</el-menu-item>
            <el-menu-item index="/audit">调度审核</el-menu-item>
            <el-menu-item index="/distribute">车辆分配</el-menu-item>
          </el-sub-menu>
          <el-sub-menu index="5">
            <template #title>
              <el-icon><Place/></el-icon><span>字典管理</span>
            </template>
            <el-menu-item index="/dict">数据字典</el-menu-item>
          </el-sub-menu>
        </el-menu>

      </div>

    <div :style="{width:(isCollapse?'calc(100% - 64px)':'calc(100% - 208px)')}">

      <el-header style="padding-top: 10px; height: 10vh; background-color: #fff">
        <!--     右侧顶部条-->
        <el-row :gutter="10">
          <el-col :span="18">
            <el-icon style="font-size: 20px" @click="changeCollapsed"><Expand /></el-icon>
          </el-col>
          <el-col :span="6" style="position: relative">
            <el-dropdown trigger="click" style="position: absolute;right: 20px;">
              <span style="font-size: 19px; font-weight: bold; " >
               {{user.username}}
                <el-icon >
                  <arrow-down />
                </el-icon>
              </span>
              <template #dropdown>
                <el-dropdown-menu>
                  <el-dropdown-item @click="logout"> 退出登录</el-dropdown-item>
                </el-dropdown-menu>
              </template>
            </el-dropdown>
          </el-col>
      </el-row>
      <!-- 面包屑导航-->
        <el-breadcrumb separator="/" style="position: relative;top: 20px;">
          <el-breadcrumb-item >首页</el-breadcrumb-item>
          <el-breadcrumb-item v-for="item in breadcrumb">{{item}}</el-breadcrumb-item>
        </el-breadcrumb>
    </el-header>
      <!--      右侧主体部分(可变区域)-->
      <el-main style="height: 90vh;padding: 0;overflow-y: auto">

        <router-view/>
      </el-main>

    </div>
  </div>
</template>

<script setup>
import {onMounted, ref} from "vue";
import {useRoute, useRouter} from "vue-router";
//面包屑导航
const breadcrumb=ref([]);
//定义对象用来维护路由path与面包屑数组值的对应关系
let map = {
  '/user':['用户管理','用户列表'],
  '/vehicle':['车辆管理','车辆列表'],
  '/geofence':['电子围栏','围栏管理'],
  '/geofenceMap':['电子围栏','新增围栏'],
  '/application':['调度管理','申请列表'],
  '/audit':['调度管理','调度审核'],
  '/distribute':['调度管理','车辆分配'],
  '/dict':['数据字典','字典管理'],
  '/dictOption':['数据字典','字典项管理']
};
//定义路由变化时更新面包屑导航(这个是路由api)
const route=useRoute();
//定义一个更新面包屑的方法,只要路由变化时立即更新面包屑
const updateBreadcrumb=(route)=>{
  const path=route.path;
  breadcrumb.value=map[path];
}
//表示一进入页面立即执行的代码
onMounted(()=>{
  updateBreadcrumb(route);
})
//路由变化时更新面包屑(router是路由器对象)
const router=useRouter();
//监听路由变化,如果发生改变则更新面包屑
router.beforeEach((to,from,next)=>{
  //更新路由器
  updateBreadcrumb(to);
  //放行路由并跳转
  next();
})


//默认开关
const  isCollapse=ref(false);
//控制折叠开关
const changeCollapsed=()=>{
  isCollapse.value=!isCollapse.value;
}
//获取用户数据
const user=ref(window.getUser());
//退出登录
const logout=()=>{
  if(confirm("确定退出登录吗？")){
    localStorage.removeItem("user");
    //转到登录界面
    window.location.href="/login";
    user.value='';
  }
}
</script>